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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c')
-rw-r--r--ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c354
1 files changed, 0 insertions, 354 deletions
diff --git a/ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c b/ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c
deleted file mode 100644
index 83611879..00000000
--- a/ANDROID_3.4.5/drivers/rtc/rtc-pcf2123.c
+++ /dev/null
@@ -1,354 +0,0 @@
-/*
- * An SPI driver for the Philips PCF2123 RTC
- * Copyright 2009 Cyber Switching, Inc.
- *
- * Author: Chris Verges <chrisv@cyberswitching.com>
- * Maintainers: http://www.cyberswitching.com
- *
- * based on the RS5C348 driver in this same directory.
- *
- * Thanks to Christian Pellegrin <chripell@fsfe.org> for
- * the sysfs contributions to this driver.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Please note that the CS is active high, so platform data
- * should look something like:
- *
- * static struct spi_board_info ek_spi_devices[] = {
- * ...
- * {
- * .modalias = "rtc-pcf2123",
- * .chip_select = 1,
- * .controller_data = (void *)AT91_PIN_PA10,
- * .max_speed_hz = 1000 * 1000,
- * .mode = SPI_CS_HIGH,
- * .bus_num = 0,
- * },
- * ...
- *};
- *
- */
-
-#include <linux/bcd.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/slab.h>
-#include <linux/rtc.h>
-#include <linux/spi/spi.h>
-#include <linux/module.h>
-
-#define DRV_VERSION "0.6"
-
-#define PCF2123_REG_CTRL1 (0x00) /* Control Register 1 */
-#define PCF2123_REG_CTRL2 (0x01) /* Control Register 2 */
-#define PCF2123_REG_SC (0x02) /* datetime */
-#define PCF2123_REG_MN (0x03)
-#define PCF2123_REG_HR (0x04)
-#define PCF2123_REG_DM (0x05)
-#define PCF2123_REG_DW (0x06)
-#define PCF2123_REG_MO (0x07)
-#define PCF2123_REG_YR (0x08)
-
-#define PCF2123_SUBADDR (1 << 4)
-#define PCF2123_WRITE ((0 << 7) | PCF2123_SUBADDR)
-#define PCF2123_READ ((1 << 7) | PCF2123_SUBADDR)
-
-static struct spi_driver pcf2123_driver;
-
-struct pcf2123_sysfs_reg {
- struct device_attribute attr;
- char name[2];
-};
-
-struct pcf2123_plat_data {
- struct rtc_device *rtc;
- struct pcf2123_sysfs_reg regs[16];
-};
-
-/*
- * Causes a 30 nanosecond delay to ensure that the PCF2123 chip select
- * is released properly after an SPI write. This function should be
- * called after EVERY read/write call over SPI.
- */
-static inline void pcf2123_delay_trec(void)
-{
- ndelay(30);
-}
-
-static ssize_t pcf2123_show(struct device *dev, struct device_attribute *attr,
- char *buffer)
-{
- struct spi_device *spi = to_spi_device(dev);
- struct pcf2123_sysfs_reg *r;
- u8 txbuf[1], rxbuf[1];
- unsigned long reg;
- int ret;
-
- r = container_of(attr, struct pcf2123_sysfs_reg, attr);
-
- if (strict_strtoul(r->name, 16, &reg))
- return -EINVAL;
-
- txbuf[0] = PCF2123_READ | reg;
- ret = spi_write_then_read(spi, txbuf, 1, rxbuf, 1);
- if (ret < 0)
- return -EIO;
- pcf2123_delay_trec();
- return sprintf(buffer, "0x%x\n", rxbuf[0]);
-}
-
-static ssize_t pcf2123_store(struct device *dev, struct device_attribute *attr,
- const char *buffer, size_t count) {
- struct spi_device *spi = to_spi_device(dev);
- struct pcf2123_sysfs_reg *r;
- u8 txbuf[2];
- unsigned long reg;
- unsigned long val;
-
- int ret;
-
- r = container_of(attr, struct pcf2123_sysfs_reg, attr);
-
- if (strict_strtoul(r->name, 16, &reg)
- || strict_strtoul(buffer, 10, &val))
- return -EINVAL;
-
- txbuf[0] = PCF2123_WRITE | reg;
- txbuf[1] = val;
- ret = spi_write(spi, txbuf, sizeof(txbuf));
- if (ret < 0)
- return -EIO;
- pcf2123_delay_trec();
- return count;
-}
-
-static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm)
-{
- struct spi_device *spi = to_spi_device(dev);
- u8 txbuf[1], rxbuf[7];
- int ret;
-
- txbuf[0] = PCF2123_READ | PCF2123_REG_SC;
- ret = spi_write_then_read(spi, txbuf, sizeof(txbuf),
- rxbuf, sizeof(rxbuf));
- if (ret < 0)
- return ret;
- pcf2123_delay_trec();
-
- tm->tm_sec = bcd2bin(rxbuf[0] & 0x7F);
- tm->tm_min = bcd2bin(rxbuf[1] & 0x7F);
- tm->tm_hour = bcd2bin(rxbuf[2] & 0x3F); /* rtc hr 0-23 */
- tm->tm_mday = bcd2bin(rxbuf[3] & 0x3F);
- tm->tm_wday = rxbuf[4] & 0x07;
- tm->tm_mon = bcd2bin(rxbuf[5] & 0x1F) - 1; /* rtc mn 1-12 */
- tm->tm_year = bcd2bin(rxbuf[6]);
- if (tm->tm_year < 70)
- tm->tm_year += 100; /* assume we are in 1970...2069 */
-
- dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
- "mday=%d, mon=%d, year=%d, wday=%d\n",
- __func__,
- tm->tm_sec, tm->tm_min, tm->tm_hour,
- tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
-
- /* the clock can give out invalid datetime, but we cannot return
- * -EINVAL otherwise hwclock will refuse to set the time on bootup.
- */
- if (rtc_valid_tm(tm) < 0)
- dev_err(dev, "retrieved date/time is not valid.\n");
-
- return 0;
-}
-
-static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm)
-{
- struct spi_device *spi = to_spi_device(dev);
- u8 txbuf[8];
- int ret;
-
- dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "
- "mday=%d, mon=%d, year=%d, wday=%d\n",
- __func__,
- tm->tm_sec, tm->tm_min, tm->tm_hour,
- tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);
-
- /* Stop the counter first */
- txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1;
- txbuf[1] = 0x20;
- ret = spi_write(spi, txbuf, 2);
- if (ret < 0)
- return ret;
- pcf2123_delay_trec();
-
- /* Set the new time */
- txbuf[0] = PCF2123_WRITE | PCF2123_REG_SC;
- txbuf[1] = bin2bcd(tm->tm_sec & 0x7F);
- txbuf[2] = bin2bcd(tm->tm_min & 0x7F);
- txbuf[3] = bin2bcd(tm->tm_hour & 0x3F);
- txbuf[4] = bin2bcd(tm->tm_mday & 0x3F);
- txbuf[5] = tm->tm_wday & 0x07;
- txbuf[6] = bin2bcd((tm->tm_mon + 1) & 0x1F); /* rtc mn 1-12 */
- txbuf[7] = bin2bcd(tm->tm_year < 100 ? tm->tm_year : tm->tm_year - 100);
-
- ret = spi_write(spi, txbuf, sizeof(txbuf));
- if (ret < 0)
- return ret;
- pcf2123_delay_trec();
-
- /* Start the counter */
- txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1;
- txbuf[1] = 0x00;
- ret = spi_write(spi, txbuf, 2);
- if (ret < 0)
- return ret;
- pcf2123_delay_trec();
-
- return 0;
-}
-
-static const struct rtc_class_ops pcf2123_rtc_ops = {
- .read_time = pcf2123_rtc_read_time,
- .set_time = pcf2123_rtc_set_time,
-};
-
-static int __devinit pcf2123_probe(struct spi_device *spi)
-{
- struct rtc_device *rtc;
- struct pcf2123_plat_data *pdata;
- u8 txbuf[2], rxbuf[2];
- int ret, i;
-
- pdata = kzalloc(sizeof(struct pcf2123_plat_data), GFP_KERNEL);
- if (!pdata)
- return -ENOMEM;
- spi->dev.platform_data = pdata;
-
- /* Send a software reset command */
- txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1;
- txbuf[1] = 0x58;
- dev_dbg(&spi->dev, "resetting RTC (0x%02X 0x%02X)\n",
- txbuf[0], txbuf[1]);
- ret = spi_write(spi, txbuf, 2 * sizeof(u8));
- if (ret < 0)
- goto kfree_exit;
- pcf2123_delay_trec();
-
- /* Stop the counter */
- txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1;
- txbuf[1] = 0x20;
- dev_dbg(&spi->dev, "stopping RTC (0x%02X 0x%02X)\n",
- txbuf[0], txbuf[1]);
- ret = spi_write(spi, txbuf, 2 * sizeof(u8));
- if (ret < 0)
- goto kfree_exit;
- pcf2123_delay_trec();
-
- /* See if the counter was actually stopped */
- txbuf[0] = PCF2123_READ | PCF2123_REG_CTRL1;
- dev_dbg(&spi->dev, "checking for presence of RTC (0x%02X)\n",
- txbuf[0]);
- ret = spi_write_then_read(spi, txbuf, 1 * sizeof(u8),
- rxbuf, 2 * sizeof(u8));
- dev_dbg(&spi->dev, "received data from RTC (0x%02X 0x%02X)\n",
- rxbuf[0], rxbuf[1]);
- if (ret < 0)
- goto kfree_exit;
- pcf2123_delay_trec();
-
- if (!(rxbuf[0] & 0x20)) {
- dev_err(&spi->dev, "chip not found\n");
- goto kfree_exit;
- }
-
- dev_info(&spi->dev, "chip found, driver version " DRV_VERSION "\n");
- dev_info(&spi->dev, "spiclk %u KHz.\n",
- (spi->max_speed_hz + 500) / 1000);
-
- /* Start the counter */
- txbuf[0] = PCF2123_WRITE | PCF2123_REG_CTRL1;
- txbuf[1] = 0x00;
- ret = spi_write(spi, txbuf, sizeof(txbuf));
- if (ret < 0)
- goto kfree_exit;
- pcf2123_delay_trec();
-
- /* Finalize the initialization */
- rtc = rtc_device_register(pcf2123_driver.driver.name, &spi->dev,
- &pcf2123_rtc_ops, THIS_MODULE);
-
- if (IS_ERR(rtc)) {
- dev_err(&spi->dev, "failed to register.\n");
- ret = PTR_ERR(rtc);
- goto kfree_exit;
- }
-
- pdata->rtc = rtc;
-
- for (i = 0; i < 16; i++) {
- sprintf(pdata->regs[i].name, "%1x", i);
- pdata->regs[i].attr.attr.mode = S_IRUGO | S_IWUSR;
- pdata->regs[i].attr.attr.name = pdata->regs[i].name;
- pdata->regs[i].attr.show = pcf2123_show;
- pdata->regs[i].attr.store = pcf2123_store;
- ret = device_create_file(&spi->dev, &pdata->regs[i].attr);
- if (ret) {
- dev_err(&spi->dev, "Unable to create sysfs %s\n",
- pdata->regs[i].name);
- goto sysfs_exit;
- }
- }
-
- return 0;
-
-sysfs_exit:
- for (i--; i >= 0; i--)
- device_remove_file(&spi->dev, &pdata->regs[i].attr);
-
-kfree_exit:
- kfree(pdata);
- spi->dev.platform_data = NULL;
- return ret;
-}
-
-static int __devexit pcf2123_remove(struct spi_device *spi)
-{
- struct pcf2123_plat_data *pdata = spi->dev.platform_data;
- int i;
-
- if (pdata) {
- struct rtc_device *rtc = pdata->rtc;
-
- if (rtc)
- rtc_device_unregister(rtc);
- for (i = 0; i < 16; i++)
- if (pdata->regs[i].name[0])
- device_remove_file(&spi->dev,
- &pdata->regs[i].attr);
- kfree(pdata);
- }
-
- return 0;
-}
-
-static struct spi_driver pcf2123_driver = {
- .driver = {
- .name = "rtc-pcf2123",
- .owner = THIS_MODULE,
- },
- .probe = pcf2123_probe,
- .remove = __devexit_p(pcf2123_remove),
-};
-
-module_spi_driver(pcf2123_driver);
-
-MODULE_AUTHOR("Chris Verges <chrisv@cyberswitching.com>");
-MODULE_DESCRIPTION("NXP PCF2123 RTC driver");
-MODULE_LICENSE("GPL");
-MODULE_VERSION(DRV_VERSION);